Package org.apache.olingo.odata2.api.uri.expression

Interface CommonExpression

All Superinterfaces:
Visitable
All Known Subinterfaces:
BinaryExpression, FilterExpression, LiteralExpression, MemberExpression, MethodExpression, OrderByExpression, OrderExpression, PropertyExpression, UnaryExpression
All Known Implementing Classes:
BinaryExpressionImpl, FilterExpressionImpl, LiteralExpressionImpl, MemberExpressionImpl, MethodExpressionImpl, OrderByExpressionImpl, OrderExpressionImpl, PropertyExpressionImpl, UnaryExpressionImpl
public interface CommonExpression extends Visitable
Parent class of all classes used to build the expression tree

This interface defines the default methods for all expression tree nodes

  • Method Details

    • getKind

      ExpressionKind getKind()
      Returns:
      Kind of this expression
      See Also:

    • getEdmType

      EdmType getEdmType()
      Returns:
      The return type of the value represented with this expression. For example the getEdmType() method for an expression representing the "concat" method will return always "Edm.String".

      This type information is set while parsing the $filter or $orderby expressions and used to do a first validation of the expression. For calculating operators like "add, sub, mul" this type information is purely based on input and output types of the operator as defined in the OData specification. So for $filter=2 add 7 the getEdmType() method of the binary expression will return Edm.Byte and not Edm.Int16 because the parser performs no real addition.

      However, the application may change this type while evaluating the expression tree.

    • setEdmType

      CommonExpression setEdmType(EdmType edmType)
      Set the edmType of this expression node
      Parameters:
      edmType - Type to be set
      Returns:
      A self reference for method chaining"

    • getUriLiteral

      String getUriLiteral()
      Returns the URI literal which lead to the creation of this expression.
      Returns:
      URI literal